<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>CSS z-index Property</title>
<style>
<!--

#a,#b{color:#FFF;}
#a{width:80px;height:80px;padding:10px;background:#F99;margin:0 0 -100px 50px;}
#a-1{width:80px;height:80px;background:#C00;}
#b{width:88px;height:90px;margin-top:5px;background:#00C;}
-->
</style>
</head>
<body>

<div id="a">
	<div id="a-1" style="position:relative;">A-1</div>
</div>
<div id="b">B</div>

</body>
</html>